Solaqua applies a targeted approach to championing safe drinking water and attaches particular importance to helping bring about sustainable improvements. One key theme concerns household water treatment and safe storage (HWTS). This includes the distribution of simple and affordable treatment methods such as filters, chlorination or disinfection by sunlight (SODIS = solar water disinfection). Since it is often easier to change children's behaviour than that of adults, Solaqua also works with schools. And since water quality is affected by hygiene conditions, Solaqua aims to realise sustainable improvements in this area, too.

If work is to be not only effective, but sustainable as well, being familiar with the people and initiatives on the ground is indispensable, and something which is only possible to a limited extent in many countries. This is why Solaqua's projects are concentrated on Nepal – one of the poorest countries in the world. Water is often available in abundance but not necessarily safe to drink. It may be drawn from unsafe sources, for example, or may become contaminated due to poor hygiene and incorrect storage. Contaminated water can cause illnesses such as diarrhoea, which is particularly dangerous for small children and adults already in poor health.

Solaqua's concrete goal for the next five years is: “The Solaqua Foundation will secure long-term access to safe drinking water for 50,000 people in disadvantaged areas of the Himalayas region by 2020.”